from django.urls.base import reverse
from django.utils.translation import gettext as _


def back_url(request, addition):
    return request.path + addition


def url_current(request):
    return request.GET.get('next', request.get_full_path())


def url_tasklist(request, user_filter_id=None, search_txt=None, common_filter_id=None):
    if user_filter_id is not None:
        return reverse('patt-userfilter', kwargs={'user_filter_id': user_filter_id})
    elif search_txt is not None:
        return reverse('search') + '?q=%s' % search_txt
    elif common_filter_id is not None:
        return reverse('patt-commonfilter', kwargs={'common_filter_id': common_filter_id})
    else:
        return reverse('patt-tasklist')


def url_projectlist(request):
    return reverse('patt-projectlist')


def url_helpview(request, page):
    return reverse('patt-helpview', kwargs={'page': page})


def url_tasknew(request, project_id):
    nxt = url_current(request)
    return reverse('patt-tasknew') + '?next=%s' % nxt + ('&project_id=%s' % project_id if project_id is not None else '')


def url_projectnew(request):
    nxt = url_current(request)
    return reverse('patt-projectnew') + '?next=%s' % nxt


def url_taskedit(request, task_id):
    nxt = url_current(request)
    return reverse('patt-taskedit', kwargs={'task_id': task_id}) + '?do=edit&next=%s' % nxt


def url_projectedit(request, project_id):
    nxt = url_current(request)
    return reverse('patt-projectedit', kwargs={'project_id': project_id}) + '?next=%s' % nxt


def url_commentnew(request, task_id):
    nxt = url_current(request)
    return reverse('patt-commentnew', kwargs={'task_id': task_id}) + '?next=%s' % nxt


def url_easysearch(request):
    return reverse('patt-easysearch')


def url_taskset(request, task_id, **kwargs):
    nxt = url_current(request)
    if kwargs.get('priority') is not None:
        return reverse('patt-taskedit', kwargs={'task_id': task_id}) + '?do=set_priority&priority=%s&next=%s' % (kwargs.get('priority'), nxt)
    elif kwargs.get('state') is not None:
        return reverse('patt-taskedit', kwargs={'task_id': task_id}) + '?do=set_state&state=%s&next=%s' % (kwargs.get('state'), nxt)
    else:
        raise Exception('Required keyword missing. One of "priority", "state" is not in %s.' % repr(kwargs.keys()))


def url_filteredit(request, search_id=None):
    if search_id is None:
        if get_search_query(request) is None:
            return reverse('patt-filternew')
        else:
            return reverse('patt-filternew') + '?q=%s' % get_search_query(request)
    else:
        return reverse('patt-filteredit', kwargs={'search_id': search_id})


def url_printview(request):
    if not is_printview(request):
        search_query = get_search_query(request)
        return '?printview' + ('&q=%s' % search_query) if search_query is not None else ''
    else:
        return request.path


def get_search_query(request):
    return request.GET.get('q')


def is_printview(request):
    return 'printview' in request.GET


def is_projectlistview(request):
    return request.META['PATH_INFO'].startswith(reverse('patt-projectlist'))


def is_tasklistview(request, search_id=None):
    if request.META['PATH_INFO'].startswith(url_tasklist('patt-tasklist', search_id)):
        return True
    if search_id is None and get_search_query(request) is not None:
        return True
    return False